articleThe Astrophysical Journal LettersJul 26, 2024GOLD OA

Observation of Gravitational Waves from the Coalescence of a 2.5–4.5 M ⊙ Compact Object and a Neutron Star

Laboratoire d’Annecy de Physique des Particules · Institut Fresnel · +31 more institutions

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Abstract

Abstract We report the observation of a coalescing compact binary with component masses 2.5–4.5 M ⊙ and 1.2–2.0 M ⊙ (all measurements quoted at the 90% credible level). The gravitational-wave signal GW230529_181500 was observed during the fourth observing run of the LIGO–Virgo–KAGRA detector network on 2023 May 29 by the LIGO Livingston observatory. The primary component of the source has a mass less than 5 M ⊙ at 99% credibility. We cannot definitively determine from gravitational-wave data alone whether either component of the source is a neutron star or a black hole. However, given existing estimates of the maximum neutron star mass, we find the most probable interpretation of the source to be the…

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Topics & keywords

Keywords
  • Physics
  • Neutron star
  • Astrophysics
  • LIGO
  • Gravitational wave
  • Black hole (networking)
  • Compact star
  • Galaxy
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